Virtuoso docker

Docker for hosting Virtuoso.

The Virtuoso is built from the latest commit SHA in https://github.com/fair-data/virtuoso-opensource (branch develop/7).

Running your Virtuoso

docker run --name my-virtuoso \
    -p 8890:8890 -p 1111:1111 \
    -e DBA_PASSWORD=myDbaPassword \
    -e SPARQL_UPDATE=true \
    -e DEFAULT_GRAPH=http://www.example.com/my-graph \
    -v /my/path/to/the/virtuoso/db:/data \
    -d tenforce/virtuoso

The Virtuoso database folder is mounted in /data.

The Docker image exposes port 8890 and 1111.

Docker compose

The image can also be configured and used via docker-compose.

db:
  image: tenforce/virtuoso:1.3.1-virtuoso7.2.2
  environment:
    SPARQL_UPDATE: "true"
    DEFAULT_GRAPH: "http://www.example.com/my-graph"
  volumes:
    - ./data/virtuoso:/data
  ports:
    - "8890:8890"

Configuration

dba password

The dba password can be set at container start up via the DBA_PASSWORD environment variable. If not set, the default dba password will be used.

SPARQL update permission

The SPARQL_UPDATE permission on the SPARQL endpoint can be granted by setting the SPARQL_UPDATE environment variable to true.

.ini configuration

All properties defined in virtuoso.ini can be configured via the environment variables. The environment variable should be prefixed with VIRT_ and have a format like VIRT_$SECTION_$KEY. $SECTION and $KEY are case sensitive. They should be CamelCased as in virtuoso.ini. E.g. property ErrorLogFile in the Database section should be configured as VIRT_Database_ErrorLogFile=error.log.

Dumping your Virtuoso data as quads

Enter the Virtuoso docker, open ISQL and execute the dump_nquads procedure. The dump will be available in /my/path/to/the/virtuoso/db/dumps.

docker exec -it my-virtuoso bash
isql-v -U dba -P $DBA_PASSWORD
SQL> dump_nquads ('dumps', 1, 10000000, 1);

For more information, see http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtRDFDumpNQuad

Loading quads in Virtuoso

Manually

Make the quad .nq files available in /my/path/to/the/virtuoso/db/dumps. The quad files might be compressed. Enter the Virtuoso docker, open ISQL, register and run the load.

docker exec -it my-virtuoso bash
isql-v -U dba -P $DBA_PASSWORD
SQL> ld_dir('dumps', '*.nq', 'http://foo.bar');
SQL> rdf_loader_run();

Validate the ll_state of the load. If ll_state is 2, the load completed.

select * from DB.DBA.load_list;

For more information, see http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader

Automatically

By default, any data that is put in the toLoad directory in the Virtuoso database folder (/my/path/to/the/virtuoso/db/toLoad) is automatically loaded into Virtuoso on the first startup of the Docker container. The default graph is set by the DEFAULT_GRAPH environment variable, which defaults to http://localhost:8890/DAV.

Creating a backup

A virtuoso backup can be created by executing the appropriate commands via the ISQL interface.

docker exec -i virtuoso_container mkdir -p backups
docker exec -i virtuoso_container isql-v <<EOF
    exec('checkpoint');
    backup_context_clear();
    backup_online('backup_',30000,0,vector('backups'));
    exit;

Restoring a backup

To restore a backup, stop the running container and restore the database using a new container.

docker run --rm  -it -v path-to-your-database:/data tenforce/virtuoso virtuoso-t +restore-backup backups/backup_ +configfile /data/virtuoso.ini

The new container will exit once the backup has been restored, you can then restart the original db container.

It is also possible to restore a backup placed in /data/backups using a environment variable. Using this approach the backup is loaded automatically on startup and it is not required to run a separate container.

docker run --name my-virtuoso \
            -p 8890:8890 \
            -p 1111:1111 \
            -e DBA_PASSWORD=dba \
            -e SPARQL_UPDATE=true \
            -e BACKUP_PREFIX=backup_ \_
            -v path-to-your-database:/data \
            -d tenforce/virtuoso